MapleStory Universe: Hacker attack leads to partial user data breach, no asset loss

The blockchain game project MapleStory Universe (MSU) announced on its platform that due to the discovery of unauthorized external access to part of its off-chain server infrastructure, all services will be placed in maintenance mode starting from November 12, 2026, at 12:43 Beijing time. Preliminary investigations indicate that the blockchain and smart contracts were not affected, and on-chain records and wallets show that this incident did not result in asset transfers or theft, and user wallet private keys were never uploaded to the MSU system.

The attackers obtained records of some users after November 5 at 07:26, including wallet addresses, nicknames, avatars, login history, some email addresses, associated social account information, OpenAPI usage records, and transaction and service activity records, but did not include real names, phone numbers, physical addresses, KYC, or payment card information. In addition, information registered for 328 applications in the Builder Center was also accessed, but the exposed API keys could not affect assets. MSU has cut off the attack path, revoked leaked credentials, and replaced affected servers, and will replace all operational keys before restoring services.